Question

What is the solution of the system?

Answer 1

i believe u have to use matrix method.

Answer 2

@hartnn is this matrix ??

Answer 3

depending on her previous questions, i think, the topic she is learning is MATRIX

Answer 4

my unit is called linear systems. so i dont know . lol

Answer 5

4x-4y=-40
-4x+7y=55
-----------
3y=10
y=10/3

Put this value in one of the equation to gt x if this is linear equation in two variables.

Answer 6

whats x though?

Answer 7

not quite if you add the 2 equations

4x - 4y = -40
-4x + 7y = 55
--------------
3y = 15

that might make for an easier answer

Answer 8

just solve for y then substitute into either equation to find x